When I open your PRJ, the new instance ( the top one) isn't there yet, but it appears if I make a change in the Size>At Birth value down in the Groups properties.
For some reason, the original channels for the fluid props not obeyed. If I manually make a change in the original curves it makes no difference. That's probably errant behavior, I think I 've encountered this before but couldn't duplicate it. I'll try to study the circumstances later.
I've tried to recreate the original channels you made in a new chor. I can reload this and it seems to behave properly. See if this works better for you.
LavaC.prj